Hi, PP does review customers accounts twice per year. So you may get an email from them.
OR, you can message them directly and ask for either a refund or reduction of your DD. Bearing in mind, you should still be in credit by at least the amount of your DD.
To message the team directly via Wattbot.if you go to the app and click on the 3 lines at the top right, then click on help, then ask Wattbot, and type in 'message the team' then you can send them your message. Might take a couple of days to get back to you, but they will.